DNS 解析出的 IP 有一个无法 ping 通

[lujjjh]

上海电信

$ dig www.v2ex.com @114.114.114.114

; <<>> DiG 9.9.7-P3 <<>> www.v2ex.com @114.114.114.114
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3646
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.v2ex.com.			IN	A

;; ANSWER SECTION:
www.v2ex.com.		64848	IN	CNAME	global.v2ex.com.
global.v2ex.com.	207	IN	A	113.113.64.45
global.v2ex.com.	207	IN	A	183.60.90.87
global.v2ex.com.	207	IN	A	183.60.90.84
global.v2ex.com.	207	IN	A	58.223.168.55

其中，113.113.64.45 无法 ping 通，其他 3 个可以 ping 通。

以下为 traceroute 的结果：

$ traceroute 113.113.64.45
traceroute to 113.113.64.45 (113.113.64.45), 64 hops max, 52 byte packets
 ...
 6  202.97.82.86 (202.97.82.86)  33.469 ms  32.949 ms  31.806 ms
 7  183.61.221.53 (183.61.221.53)  29.342 ms
    183.59.12.205 (183.59.12.205)  29.981 ms  29.675 ms
 8  183.59.12.98 (183.59.12.98)  74.267 ms
    183.59.13.198 (183.59.13.198)  35.755 ms
    183.59.12.98 (183.59.12.98)  32.409 ms
 9  183.2.241.82 (183.2.241.82)  36.338 ms
    183.6.193.138 (183.6.193.138)  34.347 ms  32.971 ms
10  183.6.195.150 (183.6.195.150)  33.707 ms
    183.6.195.194 (183.6.195.194)  34.617 ms
    183.6.195.198 (183.6.195.198)  34.719 ms
11  * * *
12  * * *
13  * * *
14  * * *
15  *^C

[lujjjh]

@Livid

[eaglexiang]

@lujjjh 他是站长吗

[DravenJohnson]

https://www.thegeekstuff.com/2010/07/how-to-disable-ping-replies-in-linux/

[Livid]

@lujjjh 非常感谢，已经拿掉这个 IP。

[miaomiao888]

以免楼主日后遇到相同问题推荐下： https://www.v2ex.com/t/419555
自动取延迟最低的 IP